Multiple layer sheet material

Abstract

The invention is an improved multiple layer packaging sheet material which can be formed into closed and sealed packages suitable for holding products containing substantial fractions of cyanoacrylate. The invention depends on the positioning of high density polyethylene in direct contact with the cyanoacrylate-type product, and positioning a primer on the other side of the high density polyethylene. Preferred embodiments of the sheet structure include additional layers to provide barrier and abuse resistance properties, and the necessary adhesive materials to hold the various layers of the structure together with good adhesion. Additional layers are contemplated. The sheet structure can be formed into a package which positions the high density polyethylene adjacent the cyanoacrylate product, and between it and the other layers at all locations of contact between the cyanoacrylate product and the packaging sheet material.

Having thus described the invention, what is claimed is: 
     
       1. A container made from a multiple layer sheet material, said sheet material comprising: (a) a first layer of high density polyethylene as an exterior layer of said sheet material;   (b) a second layer, the composition of said second layer being chosen from the group consisting of polymers and adhesives; and   (c) a third primer layer of polyethylene imine, said third primer layer being between said first and second layers and in contact with said first layer, said first layer being disposed toward the inside of said container, all the layers of said sheet material being firmly adhered to each other.     
     
     
       2. A container as in claim 1 wherein said first layer is free of amine components. 
     
     
       3. A container as in claim 1 wherein said third layer is derived from a liquid solution containing polyethylene imine of the cross-linking type. 
     
     
       4. A container as in claim 1 wherein said first layer has a narrow molecular weight distribution, is substantially free of amine components, and has a relatively high degree of crystallinity. 
     
     
       5. A container as in claim 3 wherein said first layer has a narrow molecular weight distribution, is substantially free of amine components, and has a relatively high degree of crystallinity. 
     
     
       6. A container made from a multiple layer sheet material, said sheet material comprising: (a) a first layer of high density polyethylene as an exterior layer of said sheet material;   (b) a second layer, the composition of said second layer being chosen from the group consisting of polymers and adhesives; and   (c) a third primer layer, the composition of said primer layer comprising a major fraction of Lewis base, said third primer layer being between said first and second layers and in contact with said first layer, said first layer being disposed toward the inside of said container, all the layers of said sheet material being firmly adhered to each other.     
     
     
       7. A container made from a multiple layer sheet material, said sheet material comprising: (a) a first layer of high density polyethylene;   (b) a second layer of an adhesive polymer;   (c) a third primer layer, the composition of said primer layer comprising a major fraction of Lewis base, said third layer being between said first and second layers, said first layer being disposed toward the inside of said container;   (d) a fourth layer of metal foil; and   (e) a fifth layer adhering a sixth heat sealable layer to said fourth layer, said second layer being between said third and fourth layers.     
     
     
       8. A container as in claim 7 wherein the composition of said sixth layer comprises polyethylene.